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Which of the following is/are +ve ?...

Which of the following is/are +ve ?

A

`log_(sin1) tan1`

B

`log_(cos1)(1+tan3)`

C

`log_(log_(10)5)(cos theta+sec theta)`

D

`log_(tan15^(@))(2 sin18^(@))`

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The correct Answer is:
B, D
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VK JAISWAL-COMPOUND ANGLES-Exercise-2 : One or More than One Answer is/are Correct
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  2. Which of the following is/are true ?

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  3. Which of the following is/are +ve ?

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  4. If sin alpha +cos alpha =(sqrt(3)+1)/(2), 0 lt alpha lt 2pi, then poss...

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  5. If 3sinbeta=sin(2alpha+beta) then

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  6. If sin(x+20^0)=2sinxcos40^0,w h r ex in (0,pi/2), then which of the fo...

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  7. If cosx + cosy + cosz = 0 "and" sinx + siny + sinz =0, "then show that...

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  8. If 0 lt x lt (pi)/(2) and sin^(n)x+cos^(n)x ge 1, then 'n' may belong ...

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  9. If x=sin(alpha-beta)*sin(gamma-delta), y=sin(beta-gamma)*sin(alpha-de...

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  10. If x = X cos theta- Y sin theta, y = X sin theta + Y cos theta and x^2...

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  11. If 2a=2tan10^(@)+tan50^(@), 2b=tan20^(@)+tan50^(@) 2c=2tan10^(@)+tan...

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  12. Which of the following real numbers when simplified are neither termi...

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  13. If alpha=sin x cos^(3) x and beta=cos x sin^(3) x, then :

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  14. If (pi)/(2) lt theta lt pi, then possible answers of sqrt(2+sqrt(2+2c...

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  15. If cot^(3)alpha+cot^(2)alpha+cot alpha=1 then which of the following i...

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  16. The value of x in (0,pi/2) satisfying (sqrt(3)-1)/(sinx)+(sqrt(3)+1)/(...

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  17. If alpha gt (1)/(sin^(6)x+cos^(6)x) AA x in R, then alpha can be

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  18. If x in (0, (pi)/(2)) and sinx=(3)/(sqrt(10)), Let k=log(10)sinx+log...

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  19. If A, B, C are angles of Delta ABC and tan A tan C = 3, tan B tan C =...

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  20. The value of (sin x-cos x)/(sin^(3)x) is equal to :

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